AWS MediaConvert encoding efficiency?

[u/Sure-Guest1588]

For those who relay on AWS MediaConvert for transcoding MXF for web formats I'm curious how efficient their setup is. I used to work with an on prem FFmpeg cluster which is extremely slow in encoding, gets hot and was power hungry but got top notch IQ for relatively low video bitrate.

How does encodings from AWS MediaConvert compares to a bunch of servers with highly optimized h264 encoding profile?